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oksian1 [2.3K]
2 years ago
5

Why do windows have two panes of glass separated by a layer of air

Physics
1 answer:
Soloha48 [4]2 years ago
7 0

Air is a poor conductor of heat.  The air trapped between the two panes is a pretty good <em>insulator</em>.  It does a lot to prevent heat from flowing through the windows ... keeping heat IN during the Winter, and OUT during the Summer.

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As it is stated that the lorry was in standstill position before travelling a distance or covering a distance of 3600 m, the initial velocity is considered as zero. Then, it is stated that the lorry travels with constant acceleration. So we can use the equations of motion to determine the final velocity of the lorry when it reaches 3600 m distance.

Thus, a initial velocity (u) = 0, acceleration a = 3 m/s² and the displacement s is 3600 m. The third equation of motion should be used to determine the final velocity as below.

2as =v^{2} - u^{2} \\\\v^{2} = 2as + u^{2}

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v^{2} = 2 * 3 * 3600 + 0 = 21600\\ \\v=\sqrt{21600}=146.969 m/s

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